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Mean yield pressure from the in-die Heckel analysis is a reliable plasticity parameter

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Despite the ability to characterize the plasticity of powders in a material-sparing and expedited manner, the indie Heckel analysis has been widely criticized for its sensitivity to several factors, such as particle elastic deformation, tooling size, lubrication, and speed. Using materials exhibiting a wide range of mechanical prop­ erties, we show that the in-die Py correlates strongly with three established plasticity parameters obtained from the out-of-die Heckel analysis, Kuentz-Leuenberger analysis, and macroindentation. Thus, the in-die Py is a reliable parameter for quantifying powder plasticity in a material-sparing and expedited manner.
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